Rotary engine



(No Model.) 7 2 Sheets-Sheet 1.

G. ENGBERG. ROTARY ENGINE.

No. 597,274. "Patented Jan. 11, 1898,

WI TNE SSE S INENTOFI A TTOHNEYS.

2 SheetsSheet 2. C. BNGB ROTARY ENGI (N0 Ma i ell) No. 597,274. Patented. Jan. 11,1898.

W. m w .m. M H

A TTOHNE rs.

UNITED STATES CARL ENGBERG, OF STI JOSEPH, MICHIGAN.

ROTARY ENGINE.

SFECIFIGATION forming part of Letters Patent No. 597,274, dated January 1 1, 1898.

Application filed May 6, 1897. Serial No. 685,349. (No model.)

To all whom it may concern.-

Be it known that I, CARL ENGBERG, of St. Joseph, in the county of Berrien and State of lllichiganghave invented a new and Improved Rotary Engine, of which the following is a.

full, clear, and exact description.

The object of the invention is to provide a new and improved rotary engine which is simple and d ura-ble in construction, arranged to utilize the motive agent to the fullest advantage, and constructed for direct connection with high-speed machines, such as dynainos, &c.

The invention consists principally of a pair of cylinders opening into each other at their peripheral surfaces, pistons mounted to turn concentrically in the said cylinders and in peripheral contact one with the other, pistonheads secured on the said pistons and adapted to pass one the other at recesses in the peripheries of the pistons, and a valve-gear for controlling the admission and exhaust of the steam to and from the said-recesses.

The invention also consists of certain parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a partof this specification,

in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a perspective View of the improvement. Fig. 2 is an enlarged sectional side elevation of the same on the line 2 2 in Fig. 3. Fig. 3 is a transverse section of the Fig. 4c is a like view of the steamchest and inlet-valve. Fig. 5 is a perspective view of the inlet-valve. Fig. 6 is an end elevation of the gear-wheel and its locking device for the shaft. Fig. 7 is a plan view of the same, and Figs. 8 and 9 are perspective views of the piston-valves The improved rotary engine is provided with two cylinders Aand A, opening into each other at their peripheral surfaces, as plainly indicated in Fig. 3, the cylinders being provided with a suitable base A for attaching the engine to a foundation.

In the cylinders A and A are mounted to turn concentrically the pistons B and B, re spectively secured on shafts O and C, respectively mounted to turn in suitable bearin gs in the heads of the cylinders as well as in outside bearings, as indicated in Fig. 1. The shafts O and U are connected with each other by the gear-wheels D and D, of which the gear-wheel Dis seen red directly on the shaft 0, while the gear-wheel D is loose on its shaft 0, and is provided on its outer face with a lug D projecting into the recess E of a lockingwheel E, secured to the shaft 0. A screw D is held adjustably in the lug D and abuts with its ends on the side walls of the recess E, so that the gear-wheel D can be adjusted on the locking-wheel E to bring the pistons B and B in proper relation to each other, at the sarnetirne permitting the rotary motion of one shaft to be transmitted to the other. The pistons B and B are provided with piston-heads B and B respectively dovetailed in the body of the pistons, as plainly indicated in Fig. 3, and adapted to pass each other in recesses B and B respectively'formed in the pistons 13 and B, respectively.

The outer ends of the piston-heads B and B are segmental and fit against the inner surfaces of the cylinders A and A, and the sides of the said piston-heads are curved to readily pass each other in the recesses B and 13 as above mentioned and as will be readily understood by reference to Fig. 3. The ends of the pistons, as well as the outer faces thereof and the cylindrical heads adjacent to the pistons, are provided with suitable packings to prevent leakage of steam. (See Figs. 2 and 3.) The recesses'B and B are con nected by ports a and b with annular recesses B and 13*, formed in the pistons B and B, as plainly shown in Figs. 2 and 3, and into these recesses extend the sleeves F and F, respectively mounted to turn loosely on the shafts C and O, the sleeves being provided within the said recesses with lugs F and F respectively extending to the peripheral surfaces of the recesses B and B The outer end of the sleeve F is provided with a hand-lever H under the control of the operator and adapted to be locked to a notched segment H, secured to the head A for the cylinders A A. The outer ends of the recesses 13 and B register with the ports 0 and d, formed in disks G and G, respectively secured to the inside of the cover A formed with ports e and f, registering with the ports a and d and opening into a steamchest I, containing an inlet-valve J. (See Fig. 4.) This inlet-valve J is provided with a lug J, having a port g, leading to the inside of the valve J, one end of which is connected with the steam-supply pipe K, leading to a boiler or other suitable source of steamsupply. On the stem of the valve J is secured a handle J under the control of the operator, to turn the said valve J, so as to move the lug J intoa cut-off position, as shown in Fig. 4that is, with the port g between the entrance ends of the ports e and f, opening into the chest I. lhe handle J then stands in a vertical position, as indicated in Fig. 1, and steam is cut ofi from the ports 6 and f. Now when the operator turns the handle J 2 to the left the port g then connects with the port e to admit steam into the said port, and by the port a into the recess B from which the live steam can pass through the port a intothe recess B to act on the piston B therein to rotate the pistons in the directions of the arrows at. The steam in front of the piston-heads B and B can then pass through the port 12 into the recess B and from the latter, by the ports df, into the steam chest 1, around the valve J, to the steam-exhaust pipe K, attached to the top of the said chest. W'henit is desiredto reverse the engine, the operator moves the handle J in the opposite direction-that is, to the right, so as to move the lug J to the left co-bring the port 9 in register with the port f. Steam can now pass down the latter, through the port d, into the recess 13", and from the latter, through the port 12, into the cylinder A to act on the piston-heads B B to turn the piston in the inverse direction of the arrows a.

It will be seen by reference to Fig. 2 that the recesses B and 15) are connected by small channels B with the rear ends of the pistons to equalize the pressure on the pistons at both ends, so as to cause the pistons to run easy and without undue friction.

By moving the hand-lever H the sleeve F is turned to cut off the steam at different points during the revolution of the piston. Thepacking-rings set into the head A abut against the faces of the pistons 13 B, and are held in place by segments extending into the head A and traveling in a groove inside of the packing-rings that fit against the pistons B and B. The segments on the packingnings keep the latter from slipping out of the piston-heads when leaving the walls of the cylinders.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A rotary engine, comprising a pair of cylinders opening into each other at their peripheral surfaces, pistons mounted to turn in the said cylinders and in peripheral contact one with the other, piston-heads on the said pistons and adapted to pass one the other at recesses in the peripheries of the said pistons, means for admitting and exhausting the steam to and from the said cylinders by Way of the said pistons, and cut-off valves within the said pistons and under the control of the operator, as set forth.

2. A. rotary engine, comprising a pair of cylinders opening into each other at their peripheral surfaces, pistons mounted to turn in the said cylinders and in peripheral contact with each other, piston-heads secured on the said pistons and adapted to pass each other at recesses in the peripheries of the said pistons, cut-oil? valves arranged in re cesses in the said pistons and connected by ports in the said pistons with the interior of the cylinders, and an admission and exhaust valve connected with ports leading to the said recess, substantially as shown and described.

CARL ENGBERG. Witnesses:

JOHN LINDT, JOHN EKLUND. 

